Guys - this is my situation. 2002 Durango 4.7 that has the aux fan coming on at all times. It used to only comes on when the AC is on. Now its coming on after about 20 mins of driving. Any solutions? To add to this I'm getting a 0700 tranny code. I just changed the filters and fluid but this has been happening for a few months so I dont think it has anything to do with the fluid. Is it possible that the radiator can be clogged? Temp is normal according to dash guage. Any input would be appreciated.